Orthodontic Disorders

Cross bite

Cross bite can occur in the front and/or the sides of the mouth. A posterior cross bite is what occurs when your upper teeth fall inside your lower teeth on one or both sides when you bite down. An anterior cross bite, which is similar to an under bite, is what occurs when your top front teeth fall behind your lower front teeth when you bite down.

Early correction of a cross bite is recommended in order to prevent worsening of the bite.

Cross bite should be corrected because it can:

  • cause premature wear of the teeth
  • cause gum disease including bone loss
  • cause asymmetrical development of the jaws
  • cause dysfunctional chewing patterns
  • make your smile less attractive

Crossbite Before Photo
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Crossbite After Photo
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Crossbite Before Picture
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Crossbite After Picture
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Open bite

Openbite side view illustrationOpen bite is an insufficient vertical overlap of the teeth. It is caused by oral habits such as tongue thrust, digit sucking or when the jaws don’t grow evenly. Timing of treatment is critical to the overall success of the therapy.

Openbite Before Photo
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Openbite After Photo
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Over bite

Class II Over bite

Overbite side view illustrationOver bite occurs when the upper front teeth protrude over the lower front teeth. Generally there is no contact between the upper and lower front teeth. Often you cannot see the lower incisors. Over bite is due to a disproportionate amount of eruption of front teeth or over development of the bone that supports the teeth and a front to back discrepancy in the growth of the upper or lower jaw (Class II Relationship). Over bite is also known as a deep bite.

Over bite should be corrected because it can:

  • cause improper functioning of your front teeth
  • result in the lower front teeth biting into the gum tissue of the upper palate leading to tissue problems
  • unusual wear of the lower front teeth
  • cause jaw or joint problems
  • make your smile less attractive

Overbite Before Photo
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Overbite After Photo
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Over jet

Class II Over jet

Overjet side view illustrationOver jet is also known as protrusion. In this case, the lower teeth are too far behind the upper front teeth.

Over jet should be corrected because it can:

  • prevent proper functioning of the front teeth
  • lead to premature wear
  • make your smile less attractive

Overjet Before Photo
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Overjet After Photo
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Under bite

Class III Under bite

Underbite side view illustrationThe lower teeth protrude past the front teeth. An under bite is usually caused by undergrowth of the upper jaw, overgrowth of the lower jaw, or a combination of the two (Class III Relationship). Under bite can also be caused by flared upper incisors, missing lower teeth or a combination of all the above. Early correction of under bite is recommended.

Under bite should be corrected because it can:

  • prevent proper functioning of the front teeth or molars which can lead to premature wear of the teeth
  • cause chewing or eating problems
  • cause jaw or joint problems
  • make your smile less attractive

Underbite Before Photo
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Underbite After Photo
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